EP 3765174 A1 20210120 - MULTI-STAGE BIPOLAR ELECTRODIALYSIS SYSTEM FOR HIGH CONCENTRATION ACID OR BASE PRODUCTION
Title (en)
MULTI-STAGE BIPOLAR ELECTRODIALYSIS SYSTEM FOR HIGH CONCENTRATION ACID OR BASE PRODUCTION
Title (de)
MEHRSTUFIGES BIPOLARES ELEKTRODIALYSESYSTEM FÜR DIE HERSTELLUNG HOCHKONZENTRIERTER SÄUREN ODER BASEN
Title (fr)
SYSTÈME D'ÉLECTRODIALYSE BIPOLAIRE À PLUSIEURS ÉTAGES POUR PRODUCTION D'ACIDE OU DE BASE À HAUTE CONCENTRATION
Publication
Application
Priority
- CN 201810204417 A 20180313
- US 2019021784 W 20190312
Abstract (en)
[origin: WO2019178049A1] A bipolar electrodialysis (BPED) cell is able to convert salt solutions into acid and base solutions. However, protons migrate through the anion exchange membranes and tend to neutralize the base solution. In a bipolar electrodialysis system described herein, multiple BPED cells are arranged to provide a multi-stage treatment system. Up to half, or up to one third, of the stages have cells with acid block anion membranes. The one or more stages with acid block anion membranes are located at the acid product output end of the system, where the acid concentration in the system is the highest. Replacing the traditional anion membranes in some of the stages with acid block anion membranes allows higher concentration products to be produced with moderate increase in energy consumption.
IPC 8 full level
B01D 61/44 (2006.01); B01D 61/46 (2006.01); B01D 61/50 (2006.01); B01D 69/02 (2006.01); C02F 1/469 (2006.01)
CPC (source: CN EP US)
B01D 61/423 (2022.08 - EP); B01D 61/44 (2013.01 - EP); B01D 61/445 (2013.01 - EP US); B01D 61/463 (2022.08 - EP); B01D 61/465 (2022.08 - CN EP US); B01D 61/466 (2022.08 - EP); B01D 61/485 (2013.01 - CN); B01D 61/50 (2013.01 - EP); B01D 63/0822 (2022.08 - EP); B01D 69/02 (2013.01 - EP US); C02F 1/4691 (2013.01 - US); C02F 1/4693 (2013.01 - EP); B01D 61/50 (2013.01 - US); B01D 2317/02 (2013.01 - EP US); B01D 2317/06 (2013.01 - EP); B01D 2317/08 (2013.01 - EP US); B01D 2325/42 (2013.01 - EP US); Y02A 20/124 (2018.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2019178049 A1 20190919; CA 3093413 A1 20190919; CN 110270225 A 20190924; CN 110270225 B 20230407; EP 3765174 A1 20210120; JP 2021517860 A 20210729; JP 7339957 B2 20230906; TW 201938252 A 20191001; US 2021069645 A1 20210311
DOCDB simple family (application)
US 2019021784 W 20190312; CA 3093413 A 20190312; CN 201810204417 A 20180313; EP 19713317 A 20190312; JP 2020548737 A 20190312; TW 108107006 A 20190304; US 201916978985 A 20190312